source4/auth/ntlm/auth_anonymous.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Anonymous Authentification
   5
   6    Copyright (C) Stefan Metzmacher            2004-2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "auth/auth.h"
  24 #include "auth/ntlm/auth_proto.h"
  25 #include "param/param.h"
  26
  27 _PUBLIC_ NTSTATUS auth4_anonymous_init(TALLOC_CTX *);
  28
  29 /**
  30  * Return a anonymous logon for anonymous users (username = "")
  31  *
  32  * Typically used as the first module in the auth chain, this allows
  33  * anonymou logons to be dealt with in one place.  Non-anonymou logons 'fail'
  34  * and pass onto the next module.
  35  **/
  36 static NTSTATUS anonymous_want_check(struct auth_method_context *ctx,
  37                                      TALLOC_CTX *mem_ctx,
  38                                      const struct auth_usersupplied_info *user_info)
  39 {
  40         if (user_info->client.account_name && *user_info->client.account_name) {
  41                 return NT_STATUS_NOT_IMPLEMENTED;
  42         }
  43
  44         switch (user_info->password_state) {
  45         case AUTH_PASSWORD_PLAIN:
  46                 if (user_info->password.plaintext != NULL &&
  47                     strlen(user_info->password.plaintext) > 0)
  48                 {
  49                         return NT_STATUS_NOT_IMPLEMENTED;
  50                 }
  51                 break;
  52         case AUTH_PASSWORD_HASH:
  53                 if (user_info->password.hash.lanman != NULL) {
  54                         return NT_STATUS_NOT_IMPLEMENTED;
  55                 }
  56                 if (user_info->password.hash.nt != NULL) {
  57                         return NT_STATUS_NOT_IMPLEMENTED;
  58                 }
  59                 break;
  60         case AUTH_PASSWORD_RESPONSE:
  61                 if (user_info->password.response.lanman.length == 1) {
  62                         if (user_info->password.response.lanman.data[0] != '\0') {
  63                                 return NT_STATUS_NOT_IMPLEMENTED;
  64                         }
  65                 } else if (user_info->password.response.lanman.length > 1) {
  66                         return NT_STATUS_NOT_IMPLEMENTED;
  67                 }
  68                 if (user_info->password.response.nt.length > 0) {
  69                         return NT_STATUS_NOT_IMPLEMENTED;
  70                 }
  71                 break;
  72         }
  73
  74         return NT_STATUS_OK;
  75 }
  76
  77 /**
  78  * Return a anonymous logon for anonymous users (username = "")
  79  *
  80  * Typically used as the first module in the auth chain, this allows
  81  * anonymou logons to be dealt with in one place.  Non-anonymou logons 'fail'
  82  * and pass onto the next module.
  83  **/
  84 static NTSTATUS anonymous_check_password(struct auth_method_context *ctx,
  85                                          TALLOC_CTX *mem_ctx,
  86                                          const struct auth_usersupplied_info *user_info,
  87                                          struct auth_user_info_dc **_user_info_dc,
  88                                          bool *authoritative)
  89 {
  90         return auth_anonymous_user_info_dc(mem_ctx, lpcfg_netbios_name(ctx->auth_ctx->lp_ctx), _user_info_dc);
  91 }
  92
  93 static const struct auth_operations anonymous_auth_ops = {
  94         .name           = "anonymous",
  95         .want_check     = anonymous_want_check,
  96         .check_password = anonymous_check_password
  97 };
  98
  99 _PUBLIC_ NTSTATUS auth4_anonymous_init(TALLOC_CTX *ctx)
 100 {
 101         NTSTATUS ret;
 102
 103         ret = auth_register(ctx, &anonymous_auth_ops);
 104         if (!NT_STATUS_IS_OK(ret)) {
 105                 DEBUG(0,("Failed to register 'anonymous' auth backend!\n"));
 106                 return ret;
 107         }
 108
 109         return ret;
 110 }